Not to be a nitpicking pest, but since the spelling was queried, it's "Sityodtong". It's the kind of basement gym that has great trainers and great people, even though it's not as flashy as newer MMA gyms.

Miletich: Three former UFC champs(Hughes,Pulver and Sylvia) and tons of other good fighters

Team Quest: Henderson, Lindland and Couture all started there and they have lots of talented fighters as well.

AKA: I think their Kos and Fitch are the top 2 and 3 UFC welterweights

I also have to second the vote for AKA. It had an incredible instructor pool as far as grappling, kickboxing, and MMA. The fight team roster is deep. In addition to Fitch and Kos, there is Josh Thomson, Mike Swick, Bobby Southworth, and Cain Velasquez.